Canned Tuna Dinner Recipe: Cheap and Delicious Dinner!

Canned tuna is a pantry staple that can be transformed into a delicious and satisfying meal with the right recipe. This tuna gratin combines creamy mashed potatoes, savory tuna, and melted cheese to create a dish that’s both budget-friendly and mouth-watering. Perfect for a quick dinner, this recipe will soon become a favorite in your household. Let’s dive into the details and discover how to make this delightful meal.

Why Canned Tuna?

Canned tuna is an excellent source of protein and omega-3 fatty acids, making it a nutritious choice for meals. It’s also affordable and versatile, allowing you to create a variety of dishes with ease. This recipe takes advantage of these benefits to deliver a hearty and delicious dinner.


To make this delicious tuna gratin, you will need the following ingredients:

  • 4-5 potatoes
  • 175 ml (3/4 cup) milk
  • 1 tbsp butter
  • Salt and black pepper to taste
  • 1/2 onion
  • Olive oil
  • 100 g (3.5 oz) cheese
  • 2 cans canned tuna
  • 2 tbsp tomato paste or 4 tbsp tomato sauce

Step-by-Step Instructions

Prepare the Potatoes

  1. Peel and Cut the Potatoes: Start by peeling and cutting the potatoes into small pieces. This helps them cook faster and more evenly.
  2. Boil the Potatoes: Place the cut potatoes in a pot of salted water and bring to a boil. Cook until the potatoes are tender, which should take about 10-15 minutes.

Make the Mashed Potatoes

  1. Drain the Potatoes: Once the potatoes are tender, drain them and return them to the pot.
  2. Add Milk and Butter: Add the milk, butter, salt, and black pepper to the pot.
  3. Mash Until Smooth: Use a potato masher or a fork to mash the potatoes until they are smooth and creamy. Set aside.

Prepare the Tuna Filling

  1. Chop the Onion: Finely chop the onion to add flavor and texture to the filling.
  2. Sauté the Onion: Heat some olive oil in a pan over medium heat. Add the chopped onion and sauté until it becomes translucent.
  3. Add the Tuna: Drain the canned tuna and add it to the pan with the onions. Mix well to combine.
  4. Stir in Tomato Paste or Sauce: Add the tomato paste or tomato sauce to the tuna mixture. Cook for a few minutes until the mixture is well combined and heated through.
  5. Season with Salt: Season the tuna filling with salt to taste.

Assemble the Gratin

  1. Preheat the Oven: Preheat your oven to 190°C (400°F).
  2. Layer the Ingredients: In a baking dish, spread a layer of mashed potatoes on the bottom. Add a layer of the tuna mixture on top of the mashed potatoes. Sprinkle a layer of grated cheese over the tuna mixture.
  3. Repeat Layers: Continue layering the ingredients until all are used, finishing with a layer of cheese on top.


  1. Bake the Gratin: Place the baking dish in the preheated oven. Bake for about 5 minutes or until the cheese is melted and golden brown.


  1. Cool Slightly: Remove the gratin from the oven and let it cool slightly.
  2. Slice and Serve: Slice the gratin and serve hot. Enjoy this delicious and comforting meal with your family or friends.

Tips for Success

  • Use High-Quality Tuna: Choose good-quality canned tuna for the best flavor and texture.
  • Creamy Mashed Potatoes: Ensure your mashed potatoes are smooth and creamy for a better overall texture in the gratin.
  • Even Layers: Layer the ingredients evenly to ensure each bite is perfectly balanced.

Nutritional Benefits

This tuna gratin is not only delicious but also packed with nutritional benefits:

  • High in Protein: Canned tuna is an excellent source of lean protein, essential for muscle repair and growth.
  • Rich in Omega-3 Fatty Acids: Tuna provides omega-3 fatty acids, which are beneficial for heart health.
  • Balanced Meal: The combination of potatoes, tuna, and cheese offers a balanced meal with carbohydrates, protein, and fats.

This canned tuna gratin recipe is a fantastic way to turn simple ingredients into a delicious and satisfying dinner. It’s easy to prepare, budget-friendly, and sure to be a hit with everyone at the table. Give this recipe a try and see why everyone is buying canned tuna after tasting this dish!

Additional Recipes to Try

If you enjoyed this recipe, be sure to check out these other delicious options:

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